.loading-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-indicator.active {
    display: flex;
}

.overlay {
    position: absolute;
    background-color: rgba(255, 255, 255, 0);
    /* 背景色设置为透明 */
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}